Recreating GameMaker's 2D arrays, now that they're deprecated.

array_2d.gml

// Made by TabularElf

/// @func array_2d_height
/// @param 2DArray
function array_2d_height(_array) {
    return array_length(_array);
}

/// @func array_2d_length
/// @param 2DArray
/// @param [Height]
function array_2d_length(_array, _n = 0) {
    // Used to determine _n as an optional argument
    return array_length(_array[_n]);    
}


/// @func array_2d_create
/// @param Height
/// @param Length
/// @param [Value]
function array_2d_create(_height, _length, _value = 0) {
   var _array;
   array[_height] = 0;
  for(var _i = 0; _i < _height; ++_i) {
    _array[_i] = array_create(_length, _value);
  }
  return _array;
}

/// @func array_2d_resize
/// @param 2DArray
/// @param Height
/// @param [Length]
function array_2d_resize(_array, _height, _length) {
	// Resize height
	array_resize(_array, _height);
	
        // Resize Lengths 
	if (_length != undefined) {
		for(var _i = 0; _i < _height; ++_i) {
			if (!is_array(_array[@ _i])) {
				_array[@ _i] = array_create(_length);
			} else {
				array_resize(_array[@ _i], _length);
			}
		}
	}
}

/// @func array_2d_get
/// @param array2D
/// @param height
/// @param length
function array_2d_get(_array2D, _height, _length) {
	return _array2D[_height][_length];	
}

/// @func array_2d_set
/// @param array2D
/// @param height
/// @param length
/// @param value
function array_2d_set(_array2D, _height, _length, _value) {
	_array2D[@ _height][@ _length] = _value;	
}